What is the difference between DeepSeek V3.1 and ChatGPT-4o (March 2025)?

DeepSeek V3.1 is developed by DeepSeek while ChatGPT-4o (March 2025) is developed by OpenAI. DeepSeek V3.1 has a 164K token context window vs ChatGPT-4o (March 2025)'s 128K. in 1 community votes on RIVAL, ChatGPT-4o (March 2025) wins 100% of head-to-head matchups. These results are based on blind head-to-head voting across 32 challenges.

Which is better, DeepSeek V3.1 or ChatGPT-4o (March 2025)?

Based on 1 community votes on RIVAL, ChatGPT-4o (March 2025) wins 100% of head-to-head matchups against DeepSeek V3.1.

How much does DeepSeek V3.1 cost compared to ChatGPT-4o (March 2025)?

DeepSeek V3.1 costs $0.2/M input tokens and ChatGPT-4o (March 2025) costs $5/M input tokens. DeepSeek V3.1 is $4.80/M cheaper per input. The more expensive model wins 100% of duels, so the premium may be justified by quality.

How are DeepSeek V3.1 vs ChatGPT-4o (March 2025) votes collected on RIVAL?

RIVAL presents both models' outputs side-by-side in blind duels — voters see the responses but don't know which model produced each one. This eliminates brand bias. 1 votes have been collected for this pair across 32 challenges. All vote data is part of RIVAL's open dataset.

Rival

DeepSeek V3.1vsChatGPT-4o (March 2025)

27 challenges

Why DeepSeek V3.1?

19.6x cheaper overall$0.20/M in · $0.80/M out

1.3x more context164K

5 months newerAug 2025

Why ChatGPT-4o (March 2025)?

No standout advantages

Favorites

DeepSeek V3.1ChatGPT-4o (March 2025)

Movie

The Princess Bride

19877.7

The Matrix

19998.2

Album

The Rise and Fall of Ziggy Stardust and the Spiders From Mars

David Bowie

Dark Side Of The Moon

suisside

Book

Gödel, Escher, Bach

Douglas R. Hofstadter

Братья Карамазовы

Фёдор Михайлович Достоевский

City

Kyoto

Japan

Kyoto

Japan

Game

The Legend of Zelda: Breath of the Wild

Adventure, Action4.5

The Legend of Zelda: Breath of the Wild

Adventure, Action4.5

12 / 27

AI Board Game Logicreasoning

Tests an AI's ability to understand game rules and strategy

DeepSeek V3.1

Deepseek · Aug 2025svg

No content available for this output.

ChatGPT-4o (March 2025)

Openai · Mar 2025svg

Vote

2 / 27

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

DeepSeek V3.1

Deepseek · Aug 2025text

No content available for this output.

ChatGPT-4o (March 2025)

Openai · Mar 2025text

Here are 5 jokes:

Why don’t skeletons fight each other?
Because they don’t have the guts.
I told my computer I needed a break…
Now it won’t stop sending me vacation ads.
Parallel lines have so much in common.
It’s a shame they’ll never meet.
What do you call a fish wearing a bowtie?
Sofishticated.
I asked the librarian if the library had books on paranoia.
She whispered, "They're right behind you..."

All 5 jokes are unique — none of them repeat or share the same punchline.

Vote

3 / 27

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

DeepSeek V3.1

Deepseek · Aug 2025svg

No content available for this output.

ChatGPT-4o (March 2025)

Openai · Mar 2025svg

Vote

4 / 27

Xbox Controller SVG Artimage generation

Tests an AI's ability to create detailed SVG illustrations of gaming hardware

DeepSeek V3.1

Deepseek · Aug 2025svg

No content available for this output.

ChatGPT-4o (March 2025)

Openai · Mar 2025svg

Vote

5 / 27

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

DeepSeek V3.1

Deepseek · Aug 2025text

No content available for this output.

ChatGPT-4o (March 2025)

Openai · Mar 2025text

No content available for this output.

Vote

6 / 27

Realistic AI Interviewconversation

Tests an AI's ability to simulate personalities and predict future trends

DeepSeek V3.1

Deepseek · Aug 2025text

No content available for this output.

ChatGPT-4o (March 2025)

Openai · Mar 2025text

No content available for this output.

Vote

7 / 27

Minimalist Landing Pageweb design

Tests an AI's ability to generate a complete, working landing page

DeepSeek V3.1

Deepseek · Aug 2025website

ChatGPT-4o (March 2025)

Openai · Mar 2025website

Vote

8 / 27

Mario Level UI Recreationweb design

Recreate an interactive, classic Mario level in a single HTML file.

DeepSeek V3.1

Deepseek · Aug 2025website

ChatGPT-4o (March 2025)

Openai · Mar 2025website

Vote

9 / 27

Linear App Cloneweb design

Tests an AI's ability to replicate an existing UI with Tailwind CSS

DeepSeek V3.1

Deepseek · Aug 2025website

No content available for this output.

ChatGPT-4o (March 2025)

Openai · Mar 2025website

No content available for this output.

Vote

10 / 27

Framer-Style Animationweb design

Tests an AI's ability to create smooth web animations

DeepSeek V3.1

Deepseek · Aug 2025website

No content available for this output.

ChatGPT-4o (March 2025)

Openai · Mar 2025website

No content available for this output.

Vote

11 / 27

Dark Mode Dashboardweb design

Tests an AI's UI design skills with theming support

DeepSeek V3.1

Deepseek · Aug 2025website

No content available for this output.

ChatGPT-4o (March 2025)

Openai · Mar 2025website

No content available for this output.

Vote

12 / 27

Interactive Catan Boardweb design

Tests an AI's ability to create interactive web elements

DeepSeek V3.1

Deepseek · Aug 2025website

No content available for this output.

ChatGPT-4o (March 2025)

Openai · Mar 2025website

No content available for this output.

Vote

12 of 27

FAQ

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